Goos-H(a)nchen(GH)位移只有波长数量级,在实验测量上比较困难.提出了一种基于液晶光阀(LCLV)和光束分析仪(LBP)直接测量GH位移的新方法.研究了LCLV对光偏振态调制的特性,结果发现,当外接电压发生变化时,光的偏振态也随之变化.利用LCLV对光偏振态的调制和LBP记录光斑的重心位置的变化,直接测量出TE和TM两种偏振态入射时棱镜单界面反射光束的GH位移差.这个探测方法简单,不需要复杂的外部处理电路,且实验结果与理论结果很吻合,此方法也可以进一步直接测量二维位移.
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